I installed true duals after I already had stage one, K&N air filter, Power Commander III, and Vance and Hine Ovals. Do I need to re-map the PCIII with just changing the header's. Bike seems to be running real good and I'm a little short of cash after paying for the cam chain tensioner's to be changed. Is there that big of a difference in the maps for stock exhaust with slip on's and true duals with the same slip on's? 05 Ultra twin cam 88.